EP2542766A1 - Vorrichtung zur bereitstellung eines flüssigen reduktionsmittels - Google Patents
Vorrichtung zur bereitstellung eines flüssigen reduktionsmittelsInfo
- Publication number
- EP2542766A1 EP2542766A1 EP11703181A EP11703181A EP2542766A1 EP 2542766 A1 EP2542766 A1 EP 2542766A1 EP 11703181 A EP11703181 A EP 11703181A EP 11703181 A EP11703181 A EP 11703181A EP 2542766 A1 EP2542766 A1 EP 2542766A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reducing agent
- heater
- tank
- frozen
- active
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 217
- 239000007788 liquid Substances 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims description 42
- 238000009423 ventilation Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 15
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 238000010257 thawing Methods 0.000 claims description 7
- 238000007667 floating Methods 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 239000002243 precursor Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical class O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1466—Means for venting air out of conduits or tanks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1486—Means to prevent the substance from freezing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the invention relates to a device for providing liquid reducing agent.
- the invention relates to a device in the manner of a tank for the provision of liquid reducing agent with a particularly efficient heating, with the frozen reducing agent can be remelted.
- the SCR process is often used.
- nitrogen oxide compounds (NO x ) in the exhaust gas of an internal combustion engine can be effectively reduced.
- the exhaust gas of the internal combustion engine is supplied to a reducing agent.
- This reducing agent is, for example, ammonia.
- Ammonia can be stored very poorly in a motor vehicle directly. Therefore, ammonia precursors are regularly stored, which are then converted during operation of the internal combustion engine in the required amounts to ammonia (NH 3 ).
- One such frequently used reducing agent precursor is aqueous urea solution (CH 4 N 2 O).
- An aqueous solution with a urea content of 32.5 percent is available under the trade name AdBlue and has a very high penetration.
- Reducing agent precursors are also referred to as reducing agents in the following.
- the supply of reducing agent is carried out regularly in a separate tank.
- the problem here is that the reducing agent freezes at temperatures that may well occur during operation.
- a standard urea-water solution freezes, for example, at temperatures of -11 ° C.
- Such low temperatures can occur in tanks in motor vehicles, especially during long downtimes.
- the promotion of the reducing agent from the tank described in the exhaust system of the internal combustion engine can consequently only work properly, if the reducing agent in the tank to a sufficient extent liquid available.
- a heater should heat the reducing agent as quickly and reliably as possible under all conceivable operating conditions and consume as little energy as possible.
- the device according to the invention for providing a liquid reducing agent comprises a reducing agent tank for storing the liquid reducing agent, which has at least one heater, wherein the at least one heater is movably disposed in the reducing agent tank and designed as active heating and wherein the device is an active ventilation heater for training a channel between the at least one heater and a removal point for reducing agent.
- Such a device preferably also has a metering unit with which the liquid reducing agent can be conveyed from the reducing agent tank to an exhaust gas treatment device.
- a metering unit with which the liquid reducing agent can be conveyed from the reducing agent tank to an exhaust gas treatment device.
- lines for the transport of the reducing agent, valves, pumps, filters, etc. may be provided.
- at least part of the dosing unit is arranged on or in the reducing agent tank, wherein the dosing unit is optionally separated from the reducing agent by a portion of the tank wall.
- the reducing agent tank is preferably formed with a plastic, although this is not absolutely necessary.
- a filling opening, sensors, closures, subdivisions, heat insulation, etc. may be provided in the reducing agent tank.
- An “active” heater in the sense of the present invention is, in particular, a self-heating heater which introduces heat energy into the reducing agent tank and does not merely contribute to the distribution of the heat energy.
- a heating system which introduces heat energy from cooling water of an internal combustion engine into the reducing agent tank is also regarded as an active heating system
- the active heating converts a certain form of energy (for example electrical or mechanical energy) into heat Characterized that it is not passive, so only thermally conductive.
- the movable arrangement of the active heater in the reducing agent tank allows the heater at different levels of the reducing agent in the reducing agent tank can be arranged in each case in the vicinity of the reducing agent.
- the heater can be arranged in each case in the vicinity of the fill level or the surface in the reducing agent tank.
- the movable heater may be disposed in the vicinity of the frozen reducing agent, so that a particularly efficient heat can be introduced into the frozen reducing agent. It is preferred that a guided movement of the active heating takes place, so that these z. B. is limited in the range of motion.
- the active heater is movable only in predetermined dimensions or directions, and / or that a distance from a reference point is only possible to a limited extent. In this way, it can be ensured, for example, that a connection of the active heating with the energy source (eg a current source) also exists under unfavorable conditions in the reducing agent tank.
- the energy source eg a current source
- the movable arrangement of an active heater thus leads, in particular, to the fact that the active heater is positioned (spatially limited) precisely where the heat can be introduced directly into the frozen reducing agent, regardless of the current level or the current position of the reducing agent significant amounts of liquid reducing agent and / or a gas significantly hinder the heat transfer.
- the metering unit removes the reducing agent from the reducing agent tank.
- the position of the sampling point in the reducing agent tank is regularly fixed.
- the removal point is preferably arranged in the vicinity of the tank bottom. This allows the removal of reducing agent even at low levels.
- the heater is arranged regularly with a distance to the removal point. Especially at high fill levels, the heater is regularly positioned in the top of the tank while the removal point is near the bottom of the tank. Therefore, it is advantageous if, in addition to the heater, a ventilation heating is provided, which can quickly melt into the frozen reducing agent a (gas and / or liquid-permeable) channel from the heater to the extraction point. In the vicinity of the heating, a large amount of reduction melted medium. This reducing agent can then pass through the channel to the removal point - as well as a gas balance between spaced and separated from the frozen reducing agent areas of the reducing agent tank can be achieved.
- the at least one heater is designed as a floating body.
- the heater then floats in the vicinity of a surface and / or the level when the reducing agent is (partially) liquid.
- the heater will remain in this position.
- the heater is thus always located near the reducing agent at different levels.
- the molten liquid reducing agent can efficiently transfer heat by convection from the heater to the still-frozen reducing agent.
- it is the active heating z. B. possible that it (again) moves back towards the (still) frozen proportion of reducing agent.
- the active heater may itself be designed as a float and / or be connected to at least one float or cooperate.
- each heater is formed with an associated (separate) floating body.
- a float is regularly an object that is self-buoyant due to its buoyancy by displacement according to the Archimedean principle.
- Floats that do not consist of a floating material from itself, z. B. be formed with chambers in which air and / or provided with a light solid.
- the at least one heater has at least one heating section and at least one buoyancy section.
- the heating section is in each case completely surrounded by reducing agent, while the buoyancy section determines the position of the heating in the reducing agent tank.
- the buoyancy section predefines the position of the heater in the vicinity of the fill level or a surface of the reducing agent. The fact that the heating section is completely surrounded by reducing agent, heat is efficiently introduced into the reducing agent. Accordingly, it is preferred that the at least one heating section are arranged outside towards the reducing agent and the at least one buoyancy section inside or without direct contact with the reducing agent.
- the at least one heater has a supply line for supplying the heater with energy, wherein also on the supply line an active ventilation heating is provided.
- the active (electric) heater must be powered to heat the reducing agent with energy and requires a supply line.
- at least one electrical conductor is provided in the supply line.
- the ventilation heating can therefore z. B. be designed as a heating element in the supply line.
- the (at least partially rigid and / or flexible) supply line for example, from a place in the reducing agent tank in the vicinity of the removal point out to the heater run. If the supply line has a ventilation heating, this allows the formation of a channel between the heating and the removal point in the frozen reducing agent.
- the device according to the invention is also advantageous if at least one component for detecting the fill level of the reducing agent in the reducing agent tank is provided on the at least one heater.
- the active heating regularly represents a large-scale float in the reducing agent tank.
- the position of the heating differs depending on the level. For this reason, the position of the heater can be used particularly advantageously for detecting the level.
- the at least one heater for determining the fill level in the reducing agent tank covers the surface of the reducing agent to a proportion of more than 50%, preferably more than 80% and particularly preferably more than 90%. For sloshing of the reducing agent in the reducing agent tank, a free surface of the reducing agent is regularly required.
- the device according to the invention is also advantageous if a guide structure for the at least one heater, along which the at least one heater is movable, is provided in the reducing agent tank.
- a management structure can be ensured that the heater is not uncontrolled in the reducing agent tank movable.
- the heater strikes against a removal tube for the reducing agent and / or against the tank wall of the reducing agent tank and / or a sensor and thus causes unwanted noise and / or damage.
- a removal tube for a reducing agent from a reducing agent tank simultaneously forms the guiding structure for the heating.
- the at least one heater is arranged or shaped such that in operation on a frozen reducing agent surface, a drain surface is formed for defrosted reducing agent.
- the reductant thawed by the heater must be able to reach the extraction point for reducing agent regularly.
- a suitable arrangement and / or form of the heating is specified, which is suitable for shaping the surface of the frozen reducing agent in such a way that a drainage surface or at least one drainage channel is provided. is forming.
- the frozen reducing agent surface runs approximately funnel-shaped on the removal point and / or the beginning of the channel towards.
- the active movable heater can thus be shaped overall funnel-shaped.
- the heater may have ribs.
- the fins may pattern the frozen reductant surface during thawing such that the thawed reductant may be directed towards removal and / or may proceed to the beginning of the duct of the ventilation heater.
- a method for thawing frozen reducing agent in a reducing agent tank which comprises at least the following steps:
- steps a) to d) of the process according to the invention are typically repeated continuously. Frequently, steps a) to d) also run continuously and temporally parallel to each other.
- the heating is activated (step b)), it also continues to move in the direction of the reducing agent surface (step a)).
- reducing agent is defrosted at the reducing agent surface (step c)) and fed to the removal point for the reducing agent (step d)).
- the heating always brings heat into the reducing agent precisely where frozen reducing agent is present. This increases the effectiveness of the heater. At the same time, this ensures that the heater is always able to thaw the reducing agent.
- the invention preferably finds application in a motor vehicle having an internal combustion engine and an exhaust gas treatment device, comprising a supply for reducing agent and a device according to the invention.
- the motor vehicle according to the invention is in particular also set up to carry out the method according to the invention. This technical environment is illustrated by the figures.
- FIGS. show particularly preferred embodiments, to which the invention is not limited. It should also be pointed out that the figures and in particular the illustrated proportions are schematic, wherein the same components are provided with the same reference numerals. Show it:
- FIG. 1 shows a first embodiment of a device according to the invention
- FIG. 2 shows a second embodiment of a device according to the invention
- 3 shows a third embodiment of a device according to the invention
- FIG. 5 shows a fifth embodiment variant of a device according to the invention
- FIG. 6 shows a sixth embodiment variant of a device according to the invention
- FIG. 7 shows a seventh embodiment of a device according to the invention
- FIG. 9 is a top view of the first embodiment of the device according to the invention.
- FIGS. 1 to 7 show various embodiments of the device 25 according to the invention, the common features of which are described together here.
- the device 25 according to the invention in each case has a reducing agent tank 1, which is filled up to a filling level 10 with reducing agent 2.
- a removal point 5 for removing reducing agent 2 from the reducing agent tank 1 is arranged in each case.
- the reducing agent 2 passes in each case from the removal point 5 to the metering unit 28.
- the metering unit 28 is responsible for transporting the reducing agent 2 to an exhaust gas treatment device.
- All variants 1 to 7 have in common that in the reducing agent tank 1 at least one movable active heater 3 is arranged, which floats on the reducing agent 2 or in the reducing agent 2.
- the electrical heater 3 is supplied with energy via an electrical supply line 21 (in the case of another type of active heaters, a corresponding type of supply line (eg via hot water, etc.) can be realized).
- the supply line 21 may be at risk if it is surrounded by liquid reducing agent 2. Due to the expansion of the reducing agent 2 during freezing, the supply line 21 may crack under unfavorable conditions. For this reason, the feed line 21 in the embodiment variants of FIGS. 1, 2, 3, 4 and 7 is guided such that it lies above the fill level 10 of the reducing agent 2 in the reducing agent tank 1.
- Fig. 1 additionally shows a protective device 22, by which the supply line 21 is protected.
- a guide of the supply line 21 is selected by the liquid reducing agent 2.
- the supply line 21 is made sufficiently stable or flexible so that it can endure the loads occurring during the freezing of the reducing agent 2.
- the supply line 21 shown in FIGS. 5 and 6 can also be stretchable, so that they can extend so as not to be damaged.
- the supply line 21 can be reversibly stretched by at least 10%, preferably at least 15%.
- the metering unit 28 is arranged on an upper side 31 of the reducing agent tank 1. From the removal point 5, the reducing agent 2 passes via a removal tube 4 to the metering unit 28. In the embodiment variants of FIGS. 4, 5 and 7, the metering unit 28 is arranged in the vicinity of the tank bottom 6. The metering unit 28 is arranged in the immediate vicinity of the removal point 5.
- FIG. 6 discloses a floating variant of the metering unit 28 in the reducing agent tank 1.
- the removal point 5 is arranged on the metering unit 28 and not in the vicinity of the tank bottom 6 and together with the metering unit 28 in FIG Reductant tank 1 movable.
- the dosing unit 28 um- preferably includes at least one pump, a valve and / or a filter through which the withdrawn reducing agent 2 flows.
- FIGS. 1 to 3 with the arrangement of the dosing unit 28 on the upper side 31 of the reducing agent tank 1 have in common that heating elements 7 are arranged on the withdrawal tube 4. These represent a ventilation heater 33. By means of this ventilation heater 33, a channel 15 can be thawed from the heater 3 to the removal point 5 in frozen reducing agent 2.
- a determination of the fill level 10 in the reducing agent tank 1 can also be carried out with the heater 3 at the same time.
- a first component 9 is attached to the level determination.
- the first component 9 cooperates with second components 12, which are each fastened to the removal tube 4 by way of example according to FIGS. 1 to 3.
- the second components 12 may also be attached to a tank wall 11. This is particularly useful in the variants of the device 25 without removal tube 4.
- the level 10 can be determined in the reducing agent tank 1. This can be done for example via an electrically conductive contact between the first component 9 and the second components 12 via a magnetic field or a similar technique for level determination. Other methods of determining the position of a swimmer in a vessel may also be used.
- Fig. 1 is further shown that the heater 3 is guided on a guide structure 13 in the reducing agent tank 1. Thus, it can be prevented that the heater 3 moves uncontrollably in the reducing agent tank 1.
- the embodiment according to FIG. 4 also has such a guide structure 13 for the heater 3.
- the heater has 3 ribs 23 through which the frozen reducing agent surface 14 can be formed during heating so that a suitable flow area 32 for reducing agent 2 to the sampling point 5 and / or to the input 24 of the channel 15 is generated.
- FIG. 9 shows a section from above through this embodiment.
- the guide structures 13 for guiding the heater 3.
- the reducing agent tank 1 in which the heater 3 is guided by the guide structure 13.
- the heater 3 extends over the cross-sectional area 8 of the reducing agent tank 1 to a proportion of more than 50%.
- the ribs 23 are arranged such that reducing agent 2 can flow even in an inclined position of the device 25 in the direction of the removal point 5.
- the heater 3 is funnel-shaped as shown in FIG. It is also possible to combine both features.
- the heater 3 may then be funnel-shaped and additionally have ribs 23.
- the fourth embodiment of FIG. 4 has such ribs 23 on the heater 3.
- the heater 3 according to the seventh embodiment variant has ribs 23 which can produce a suitable drainage area 32 on the frozen reducing agent surface 14.
- the heater 3 has floats 26. These floats 26 ensure that the heater 3 is at least partially closed in a defined position. is disposed below the reducing agent surface 14.
- the heater 3 is particularly designed to have a heating section 34 and a buoyancy section 35.
- the buoyant section 35 formed by the floats 26 ensures the correct position of the heater 3 in the reducing agent 2.
- the heating section 34 is covered by reducing agent 2 and it ensures a particularly efficient heat input from the heater 3 in the reducing agent 2. It is preferred that this floating heater does not move more than 5 centimeters from the reducing agent surface 14.
- a system heater 30 is provided in each case through which reducing agent 2 can be melted on the outside of the metering unit 28.
- the system heater 30 may also generate an ice cavity 29 around the metering unit 28 in frozen reductant 2. If no liquid reducing agent 2 is present in the ice cavity 29, the ice cavity 29 constitutes thermal insulation of the dosing unit 28 with respect to the remaining reducing agent 2 in the reduction tank 1. This can happen if the dosing unit 28 delivers the liquid reducing agent 2 faster than the system heating 30, the reducing agent 2 can melt. The ice cavity 29 may thus prevent the system heater 30 from melting frozen reductant 2. For this reason, the movable heater 3 in the reducing agent tank 1 in the embodiment variants according to FIGS. 4, 5 and 7 of the device 25 with the dosing unit 28 arranged on the tank bottom 6 is particularly advantageous.
- the ventilation heater 33 is formed by a rod-shaped guide structure 13 which extends away from the dosing unit 28. Along the guide structure 13, a channel 15 is formed by the ventilation heater 33.
- the ventilation heater 33 is provided to form a channel 15 from the heater 3 to the removal point 5 by means of a reducing agent line 20 mounted on the outside of the tank wall 11.
- This reducing agent line 20 serves to convey the reducing agent 2 from the metering unit 28 to an exhaust gas treatment device in the exhaust system of an internal combustion engine.
- the reducing agent line 20 is designed, for example, as a heatable hose with heating elements 7.
- the reducing agent line 20 thus forms a ventilation heater 33 for forming a channel 15 of the heater 3 for removal point 5, which is very easy to implement, regardless of the design of the reducing agent tank 1.
- Fig. 8 shows the outside of the tank wall 11 mounted reducing agent line 20 again in detail.
- This reducing agent line 20 has heating elements 7, through which a channel 15 in the reducing agent 2 can be generated on the inside of the tank wall 11.
- a plurality of heaters 3 are provided in the reducing agent tank 1.
- the heaters 3 float in a predetermined range of motion relatively freely movable in the reducing agent 2.
- the heaters 3 of FIG. 5 may have various configurations. According to the variant shown on the left, the heater 3 has a float 26 and is thus divided into a buoyancy section 35 and a heating section 34. This ensures that the heating section 34 is in each case completely surrounded by reducing agent 2 and thus a particularly efficient heat input into the reducing agent 2 takes place.
- the middle heater 3 in Fig. 5 has a damping 27. This can be, for example, an elastic porous layer with which external shocks are damped.
- the embodiment of the heater 3 shown on the right in FIG. 5 has no such features.
- the heaters 3 are executed according to FIG. 3 each as a spherical float. But there are also any others Shapes possible. For example, at least one freely movable planar heater 3 may be present.
- an electrical supply line 21 is provided, which extends through the reducing agent 2. As already stated, these leads 21 must be sufficiently stable and / or stretchable.
- the leads 21 have electrical lines for supplying the heater 3.
- the supply lines 21 have ventilation heaters 33.
- the ventilation heaters 33 melt along the supply lines 21 channels 15 of the heaters 3 to the removal agency 5 free.
- the electrical lines can also form the ventilation heater 33 at the same time.
- the embodiment variant of the device according to FIG. 6 has a metering unit 28, which as a whole is arranged to float in the reducing agent tank 1.
- This metering unit 28 has a system heater 30 for thawing reducing agent 2.
- This system heater 30 at the same time forms the movable active heater 3.
- the metering unit 28 can also lower when reducing the reducing agent surface 14 in the reducing agent tank 1.
- the heater 3 is also movable.
- an ice cavity 29 is melted in the reducing agent surface 14.
- the metering unit 28 and the heater 3 can sink into this ice cavity 29.
- the metering unit 28 and the heater 3 also have a guide structure 13, which at the same time also represents the supply line 21 for the heater 3.
- the reducing agent line 20 for discharging the reducing agent 2 from the device 25 is also provided on the guide structure 13.
- 10 shows an inventive motor vehicle 16, comprising an internal combustion engine 17 and an exhaust gas treatment device 18 for treating the exhaust gases of the internal combustion engine 17.
- the exhaust gas treatment device 18 has a supply 19.
- the supply 19 is connected to the device 25 via a reducing agent line 20. and is supplied via the reducing agent line 20 from the device 25 with reducing agent.
- the reducing agent 2 can be added to the exhaust gas as needed and a purification of the exhaust gas can be achieved by the so-called SCR method.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010010528A DE102010010528A1 (de) | 2010-03-05 | 2010-03-05 | Vorrichtung zur Bereitstellung eines flüssigen Reduktionsmittels |
PCT/EP2011/051435 WO2011107312A1 (de) | 2010-03-05 | 2011-02-02 | Vorrichtung zur bereitstellung eines flüssigen reduktionsmittels |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2542766A1 true EP2542766A1 (de) | 2013-01-09 |
EP2542766B1 EP2542766B1 (de) | 2015-05-20 |
Family
ID=43881175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11703181.5A Active EP2542766B1 (de) | 2010-03-05 | 2011-02-02 | Vorrichtung zur bereitstellung eines flüssigen reduktionsmittels |
Country Status (5)
Country | Link |
---|---|
US (1) | US8756919B2 (de) |
EP (1) | EP2542766B1 (de) |
JP (1) | JP5749747B2 (de) |
DE (1) | DE102010010528A1 (de) |
WO (1) | WO2011107312A1 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012004727A1 (de) * | 2012-03-07 | 2013-09-12 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Vorrichtung zur Bereitstellung von flüssigem Additiv |
FR3004217B1 (fr) * | 2013-04-09 | 2015-04-24 | Peugeot Citroen Automobiles Sa | Reservoir de stockage de liquide d'un vehicule |
DE102014000643A1 (de) | 2013-07-26 | 2015-01-29 | Tesona Gmbh & Co. Kg | Vorrichtung zur Aufnahme und Bereitstellung von flüssigem Reduktionsmittel |
DE102014001880A1 (de) * | 2014-02-14 | 2015-08-20 | Deutz Aktiengesellschaft | Verfahren zum Reinigen von Dieselmotorenabgassen |
DE102014107863A1 (de) * | 2014-06-04 | 2015-12-17 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Verfahren zur Funktionsprüfung mindestens eines PTC-Heizelementes |
DE102014015714A1 (de) | 2014-07-02 | 2016-01-07 | ARTE Reverse Engineering GbR (vertretungsberechtigte Gesellschafter Alexander Reinisch, 98617 Vachdorf; Heiko Lantzsch, 99817 Eisenach) | Heizeinrichtung für eine Vorrichtung zur Aufnahme und Bereitstellung von flüssigem Reduktionsmittel |
JP2016121620A (ja) * | 2014-12-25 | 2016-07-07 | 三菱自動車工業株式会社 | 燃料タンク装置 |
JP2016121615A (ja) * | 2014-12-25 | 2016-07-07 | 三菱自動車工業株式会社 | 燃料タンク装置 |
DE102015016638A1 (de) | 2015-03-09 | 2016-09-15 | ARTE Reverse Engineering GbR (vertretungsberechtigte Gesellschafter Alexander Reinisch, 98617 Vachdorf; Heiko Lantzsch, 99817 Eisenach) | Heizeinrichtung für eine Vorrichtung zur Aufnahme und Bereitstellung von flüssigem Reduktionsmittel |
EP3070285B1 (de) * | 2015-03-18 | 2017-10-18 | Röchling Automotive SE & Co. KG | Medienbehälter mit einem komprimierbaren Sicherungskörper als Volumenreservoir für den Fall einer Ausdehnung eines im Medienbehälter aufgenommenen Mediums |
DE102015013877B3 (de) | 2015-10-28 | 2016-12-22 | Audi Ag | Verfahren zum Betreiben einer Fluidbehälteranordnung sowie entsprechende Fluidbehälteranordnung |
FR3060103B1 (fr) * | 2016-12-09 | 2021-01-15 | Plastic Omnium Advanced Innovation & Res | Reservoir avec systeme de chauffage et vehicule automobile comportant un tel reservoir. |
DE102018202472A1 (de) * | 2017-03-20 | 2018-09-20 | Robert Bosch Engineering And Business Solutions Private Limited | Tank für ein System zur selektiven katalytischen Reduktion |
DE102017223862A1 (de) * | 2017-12-28 | 2019-07-04 | Röchling Automotive SE & Co. KG | Halbzeug zur Herstellung einer kombinierten Heiz- und Schwappschutzvorrichtung und daraus gebildete Vorrichtung |
DE102018210455A1 (de) * | 2018-06-27 | 2020-01-02 | Robert Bosch Gmbh | Tankvorrichtung |
DE102018214157A1 (de) * | 2018-08-22 | 2020-02-27 | Robert Bosch Gmbh | Tankanordnung |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS567938A (en) * | 1979-06-27 | 1981-01-27 | Shuichi Sakai | Heater with signal indication |
JPS6259992U (de) * | 1985-10-03 | 1987-04-14 | ||
EP0839264B1 (de) * | 1994-09-13 | 1999-12-01 | Siemens Aktiengesellschaft | Verfahren und einrichtung zum einbringen von flüssigkeit in eine abgasreinigungsvorrichtung |
DE10323591A1 (de) * | 2003-05-16 | 2004-12-02 | E.G.O. Elektro-Gerätebau GmbH | Verfahren und Vorrichtung zur Erzeugung eines Gases aus einem Sublimationsgut |
JP2005248824A (ja) * | 2004-03-04 | 2005-09-15 | Hino Motors Ltd | 尿素水解凍装置 |
JP4248442B2 (ja) * | 2004-04-12 | 2009-04-02 | 日産ディーゼル工業株式会社 | 車両用還元剤タンク |
DE102006061735A1 (de) * | 2006-12-28 | 2008-07-03 | Robert Bosch Gmbh | Belüftungsheizung für Reduktionsmitteltank |
US7930878B2 (en) * | 2007-02-27 | 2011-04-26 | Ford Global Technologies, Llc | Method and apparatus for rapidly thawing frozen NOx reductant |
FR2916188B1 (fr) * | 2007-05-16 | 2011-05-06 | Inergy Automotive Systems Res | Reservoir a uree et embase avec element chauffant integre. |
DE102007024782B4 (de) * | 2007-05-26 | 2011-08-25 | Eichenauer Heizelemente GmbH & Co. KG, 76870 | Heizeinsatz und dessen Verwendung in einem Harnstoffversorgungssystem |
DE102007041524B4 (de) * | 2007-08-31 | 2023-09-28 | Robert Bosch Gmbh | Tank für ein Medium zum Einsatz in einer Abgasnachbehandlungsanordnung |
DE102008041723A1 (de) * | 2008-08-29 | 2010-03-04 | Robert Bosch Gmbh | Tank zur Bevorratung eines flüssigen Wirkstoffes |
US20100146940A1 (en) * | 2008-12-17 | 2010-06-17 | Delphi Technologies, Inc. | Active buoyant urea heater |
-
2010
- 2010-03-05 DE DE102010010528A patent/DE102010010528A1/de not_active Withdrawn
-
2011
- 2011-02-02 EP EP11703181.5A patent/EP2542766B1/de active Active
- 2011-02-02 JP JP2012555343A patent/JP5749747B2/ja active Active
- 2011-02-02 WO PCT/EP2011/051435 patent/WO2011107312A1/de active Application Filing
-
2012
- 2012-08-31 US US13/601,342 patent/US8756919B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011107312A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2542766B1 (de) | 2015-05-20 |
WO2011107312A1 (de) | 2011-09-09 |
US8756919B2 (en) | 2014-06-24 |
DE102010010528A1 (de) | 2011-09-08 |
JP2013521430A (ja) | 2013-06-10 |
JP5749747B2 (ja) | 2015-07-15 |
US20130192204A1 (en) | 2013-08-01 |
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